Cheesy Broccoli Casserole

Ingredients :
1 onion, diced
1⁄2 cup celery, diced
2 tablespoons butter
1 (5 ounce) can premium chunk chicken
1⁄2 teaspoon salt
1⁄2 teaspoon pepper
2 (10 1/2 ounce) cans cream of chicken soup
1 (5 ounce) can Carnation Evaporated Milk
2 cups cooked rice
10 ounces frozen chopped broccoli, microwaved about 6 minutes to thaw
2 1⁄2 cups sharp cheddar cheese, shredded and divided

Instructions :
Saute onions and celery in butter until soft. Add chicken, salt, and pepper. Saute a minute or so to marry flavors. In a large bowl, combine soup, milk, rice, broccoli, onion/chicken mixture. Fold in 2 cups cheese. Pour into a greased 2 quart casserole dish. Top with remaining 1/2 cup cheese. Bake at 350 degrees for 30-40 minutes uncovered.